diff --git a/README.md b/README.md
index bb6375b..cfccd23 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Contents
 **   ** **5. Data:** **             **  **[`JSON`](#json)**__,__ **[`Pickle`](#pickle)**__,__ **[`CSV`](#csv)**__,__ **[`SQLite`](#sqlite)**__,__ **[`Bytes`](#bytes)**__,__ **[`Struct`](#struct)**__,__ **[`Array`](#array)**__,__ **[`Memory_View`](#memory-view)**__,__ **[`Deque`](#deque)**__.__  
 **   ** **6. Advanced:** **   **  **[`Threading`](#threading)**__,__ **[`Operator`](#operator)**__,__ **[`Introspection`](#introspection)**__,__ **[`Metaprograming`](#metaprograming)**__,__ **[`Eval`](#eval)**__,__ **[`Coroutines`](#coroutines)**__.__  
 **   ** **7. Libraries:** **      **  **[`Progress_Bar`](#progress-bar)**__,__ **[`Plot`](#plot)**__,__ **[`Table`](#table)**__,__ **[`Curses`](#curses)**__,__ **[`Logging`](#logging)**__,__ **[`Scraping`](#scraping)**__,__ **[`Web`](#web)**__,__ **[`Profile`](#profiling)**__,__  
-**                                 ** **[`NumPy`](#numpy)**__,__ **[`Image`](#image)**__,__ **[`Audio`](#audio)**__,__ **[`Games`](#pygame)**__,__ **[`Data`](#pandas)**__,__ **[`GUI`](#gui)**__.__
+**                                 ** **[`NumPy`](#numpy)**__,__ **[`Image`](#image)**__,__ **[`Audio`](#audio)**__,__ **[`Games`](#pygame)**__,__ **[`Data`](#pandas)**__,__ **[`GUI`](#pysimplegui)**__.__
 
 
 Main
@@ -1196,7 +1196,6 @@ Hello World!
 
 Iterable Duck Types
 -------------------
-
 ### Iterable
 * **Only required method is iter(). It should return an iterator of object's items.**
 * **Contains() automatically works on any object that has iter() defined.**
@@ -1342,7 +1341,6 @@ LogicOp = Enum('LogicOp', {'AND': partial(lambda l, r: l and r),
 
 Exceptions
 ----------
-
 ### Basic Example
 ```python
 try:
@@ -2913,7 +2911,6 @@ simpleaudio.play_buffer(samples_b, 1, 2, F)
 
 Pygame
 ------
-
 ### Basic Example
 ```python
 # $ pip3 install pygame
@@ -3068,7 +3065,6 @@ if __name__ == '__main__':
 
 Pandas
 ------
-
 ```python
 # $ pip3 install pandas
 import pandas as pd
@@ -3347,7 +3343,6 @@ c  7  8
 
 Plotly
 ------
-
 ```python
 # $ pip3 install plotly
 from plotly.express import line
@@ -3425,8 +3420,8 @@ if __name__ == '__main__':
 ```
 
 
-GUI
----
+PySimpleGUI
+-----------
 ```python
 # $ pip3 install PySimpleGUI
 import PySimpleGUI as sg
@@ -3439,7 +3434,6 @@ print(f'Hello {values[0]}!')
 
 Appendix
 --------
-
 ### Cython
 **Library that compiles Python code into C.**
 
diff --git a/index.html b/index.html
index d775315..cfed481 100644
--- a/index.html
+++ b/index.html
@@ -227,7 +227,7 @@ pre.prettyprint {
     <strong><span class="hljs-string"><span class="hljs-string">'5. Data'</span></span></strong>:        [<a href="#json">JSON</a>, <a href="#pickle">Pickle</a>, <a href="#csv">CSV</a>, <a href="#sqlite">SQLite</a>, <a href="#bytes">Bytes</a>, <a href="#struct">Struct</a>, <a href="#array">Array</a>, <a href="#memoryview">Memory_View</a>, <a href="#deque">Deque</a>],
     <strong><span class="hljs-string"><span class="hljs-string">'6. Advanced'</span></span></strong>:    [<a href="#threading">Threading</a>, <a href="#operator">Operator</a>, <a href="#introspection">Introspection</a>, <a href="#metaprograming">Metaprograming</a>, <a href="#eval">Eval</a>, <a href="#coroutines">Coroutine</a>],
     <strong><span class="hljs-string"><span class="hljs-string">'7. Libraries'</span></span></strong>:   [<a href="#progressbar">Progress_Bar</a>, <a href="#plot">Plot</a>, <a href="#table">Table</a>, <a href="#curses">Curses</a>, <a href="#logging">Logging</a>, <a href="#scraping">Scraping</a>, <a href="#web">Web</a>, <a href="#profiling">Profile</a>,
-                       <a href="#numpy">NumPy</a>, <a href="#image">Image</a>, <a href="#audio">Audio</a>, <a href="#pygame">Games</a>, <a href="#pandas">Data</a>, <a href="#gui">GUI</a>]
+                       <a href="#numpy">NumPy</a>, <a href="#image">Image</a>, <a href="#audio">Audio</a>, <a href="#pygame">Games</a>, <a href="#pandas">Data</a>, <a href="#pysimplegui">GUI</a>]
 }
 </code></pre></div></div>
 
@@ -2908,7 +2908,7 @@ line(df, x=<span class="hljs-string">'Date'</span>, y=<span class="hljs-string">
 
 
 
-<div><h2 id="gui"><a href="#gui" name="gui">#</a>GUI</h2><pre><code class="python language-python hljs"><span class="hljs-comment"># $ pip3 install PySimpleGUI</span>
+<div><h2 id="pysimplegui"><a href="#pysimplegui" name="pysimplegui">#</a>PySimpleGUI</h2><pre><code class="python language-python hljs"><span class="hljs-comment"># $ pip3 install PySimpleGUI</span>
 <span class="hljs-keyword">import</span> PySimpleGUI <span class="hljs-keyword">as</span> sg
 layout = [[sg.Text(<span class="hljs-string">"What's your name?"</span>)], [sg.Input()], [sg.Button(<span class="hljs-string">'Ok'</span>)]]
 window = sg.Window(<span class="hljs-string">'Window Title'</span>, layout)
diff --git a/parse.js b/parse.js
index db16828..f4eebcd 100755
--- a/parse.js
+++ b/parse.js
@@ -26,7 +26,7 @@ const TOC =
   '    <strong><span class="hljs-string">\'5. Data\'</span></strong>:        [<a href="#json">JSON</a>, <a href="#pickle">Pickle</a>, <a href="#csv">CSV</a>, <a href="#sqlite">SQLite</a>, <a href="#bytes">Bytes</a>, <a href="#struct">Struct</a>, <a href="#array">Array</a>, <a href="#memoryview">Memory_View</a>, <a href="#deque">Deque</a>],\n' +
   '    <strong><span class="hljs-string">\'6. Advanced\'</span></strong>:    [<a href="#threading">Threading</a>, <a href="#operator">Operator</a>, <a href="#introspection">Introspection</a>, <a href="#metaprograming">Metaprograming</a>, <a href="#eval">Eval</a>, <a href="#coroutines">Coroutine</a>],\n' +
   '    <strong><span class="hljs-string">\'7. Libraries\'</span></strong>:   [<a href="#progressbar">Progress_Bar</a>, <a href="#plot">Plot</a>, <a href="#table">Table</a>, <a href="#curses">Curses</a>, <a href="#logging">Logging</a>, <a href="#scraping">Scraping</a>, <a href="#web">Web</a>, <a href="#profiling">Profile</a>,\n' +
-  '                       <a href="#numpy">NumPy</a>, <a href="#image">Image</a>, <a href="#audio">Audio</a>, <a href="#pygame">Games</a>, <a href="#pandas">Data</a>, <a href="#gui">GUI</a>]\n' +
+  '                       <a href="#numpy">NumPy</a>, <a href="#image">Image</a>, <a href="#audio">Audio</a>, <a href="#pygame">Games</a>, <a href="#pandas">Data</a>, <a href="#pysimplegui">GUI</a>]\n' +
   '}\n' +
   '</code></pre>\n';